{OS.read ... } and STDIN

[Johann Höchtl]

Hello !

Given the following small 'programm'

local
   ReadList
   ReadList2
   STDIN = {OS.fileDesc 'STDIN_FILENO'}
in
   {OS.read STDIN 3 ReadList _ _}
   {OS.read STDIN 3 ReadList2 _ _ }
   {Show ReadList}
   {Show ReadList2}
end

and executed within the OPI, behaves IMHO a quite strange.

Suppose when the first {OS.read STDIN 3 ReadList _ _}is reached, I enter

Hi

into the emulator window in emacs. The buffer now contains "Hi" and the 
Tailpos returns 2. Two Elements have been read, everything is fine.

But the second    {OS.read STDIN 3 ReadList2 _ _ } does not block, but 
immediately rutrns a single '10'.

I suspect there is sthg wrong concerning cr/lf handling vs a single lf 
 (or is it cr? ) in the UNIX world. I can be wrong but i have currently 
no acces to a unix box to verify this.

Is this a limitation of Mozart on a Windows box ? I know that there is 
also {Open.text ...}. Will this behave as expected ?

BTW: I think the OS - module lacks a flush function. When you enter eg 
10 bytes but read only 3 than the first call to read would yield the 
first 3 characters, while the next call to read would return the 
remaining 7 *but this time an appended '10'* (lf or cr ?)

-
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